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Rouxinol R-53B is a medium tension nylon string set for classical guitar, made in Brazil. The trebles are black nylon technical monofilament and the basses are a multifilament nylon core wound with silver-plated metal, with loop ends and tube-finished bass strings.

Gauges run .028in to .043in (0.71mm to 1.09mm). Each pack holds a full set of six strings plus a free pick.

Rouxinol has made strings in Sao Paulo, Brazil since 1960, from classical and steel-string guitar to cavaquinho and viola.

• Made in Brazil by Rouxinol, string makers in Sao Paulo since 1960
• Tension: Medium
• Trebles: technical black nylon monofilament
• Basses: multifilament nylon core wound with silver-plated metal
• String ends: Loop End with tube finish on the bass strings
• Gauges: 1st E .028in (0.71mm), 2nd B .032in (0.81mm), 3rd G .040in (1.02mm), 4th D .029in (0.74mm), 5th A .035in (0.89mm), 6th E .043in (1.09mm)
• 6-string set with a free Rouxinol pick in every pack